Abstracts Book - IMRC 2018

• SF5-P017
PHOTOCATALYTIC ACTIVITY OF SnO2 and SnO2 / Ag3PO4 UNDER
IRRADIATION OF LED LIGHT FOR THE DEGRADATION OF
METHYLENE BLUE.
Yerania Sarahi Rodriguez Ramirez 1 , Ma. Elvira Zarazúa Morín 1 , Víctor Jesús Gallegos Sánchez 2 ,
Leticia Myriam Torres Guerra 1
1 Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de
Ecomateriales y Energía, Mexico. 2 Educativa, nanotecnologia, Mexico.
The oxides of semiconductor metals have attracted considerable attention due
to their distinctive and flattering properties. Mixed oxides of transition metals
such as tin and silver are capable of mutual interactions, which lead to the
formation of a complex structure. It has been reported that the catalytic activity
of the mixture oxides is usually higher than those of their individual oxides
[1]. Currently as a product of human activity, the environment faces a strong
problem in terms of water pollution, by the presence of industrial waste, drugs,
pesticides, among other pollutants that have high chemical stability, property
that makes them resistant to conventional treatments. [2][3] Photocatalytic
processes have been reported as processes capable of degrading and
mineralizing contaminating organic molecules with the participation of a
catalyst, and UV, visible light and LED [4][5]. LED lighting has stood out for its
high efficiency with a saving of more than 80% of energy compared to
conventional lamps, in addition to the fact that the beam of light is free of
infrared rays so it does not radiate heat, and in turn does not emit ultraviolet
light, In addition, the useful life of a LED lamp is up to 15,000 hours, that is 15
times more than traditional lamps. In this work we present results of the mixture
of SnO 2 / Ag 3 PO 4 oxides by the co-precipitation method, in relation of weight
percentage of 99/1, 95/5 and 90/10 respectively. The materials were
characterized by various analytical techniques such as: X-Ray diffraction,
scanning electron microscopy, UV-vis and nitrogen adsorption. The
photocatalytic efficiency was evaluated by means of the degradation of the
organic molecule of methylene blue in aqueous medium, under irradiation of
LED light. The results show that the mixture of the SnO 2 / Ag 3 PO 4 oxides in 90/10
percentage presents 48 % as much efficiency compared to the tin oxide alone.
This increase can be attribute to the possible inhibitory effect of the
recombination of charges that Ag 3 PO 4 possesses.
Acknowledgment: